Clinical data
ATC code None
CAS Number 19291-69-1
PubChem (CID) 11726670
ChemSpider 9901386
Chemical and physical data
Formula C23H27ClO2
Molar mass 370.912 g/mol
3D model (Jmol) Interactive image

Gestaclone (INN, USAN) (developmental code name SH-1040), also known as 6-chloro-1α,2α:16α,17-bismethylene-4,6-pregnadiene-3,20-dione, is a steroidal progestin of unique chemical structure derived from progesterone that was first described in 1967 and was never marketed.[1]


  1. J. Elks (14 November 2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. p. 595. ISBN 978-1-4757-2085-3.

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